Examples from the Web for diatom
It is necessary to avoid any air current which will cause the diatom to fall from the thread.
Thus Pseudocerataulus Kinkeri is a diatom which cannot possibly be seen without the use of a microscope.The Romance of Plant Life|G. F. Scott Elliot
This diatom is often found in abundance in the water supplies of cities.Through a Microscope|Samuel Wells
The diatom itself may be washed in the same way, if it is not too small.
Diatom ooze is the characteristic deposit in high southern latitudes.